University of Reading
CONSTRUCTING A GRAVITY WAVE CLIMATOLOGY OVER THE VERTICAL EXTENT OF THE ATMOSPHERE USING DIFFERENT MEASUREMENT TECHNIQUES.
Authors: G.J. Marlton, A.J. Charlton-Perez and R.G. Harrison
(Department of Meteorology, University of Reading, Reading, United Kingdom)
Gravity waves are ubiquitous throughout the entire height of the atmosphere, different measurement technologies exist to observe gravity waves over different vertical ranges. However, they are rarely combined to produce a vertical profile of gravity wave activity, let alone show the seasonal variation. Presented here is a vertically varying seasonal gravity wave climatology at Haute Province Observatorie (OHP) . At the surface infrasound arrays will be used to derive gravity wave parameters from a combination of infrasound data and meteorological from the array. In the lower stratosphere, 10-30km, radiosonde profiles from a co-located operational radiosonde site will be used to infer gravity wave properties. A wavelet analysis of the wind and temperature profiles is used to decompose the gravity wave field into individual wavelets for hodographic analysis. At 30-80km the stratospheric temperature lidar, which can observe changes in the density of the air in the profile, will be used to observe gravity waves by looking at the temperature fluctuations. At 85km airglow images can also be used to infer gravity wave information. Seasonal gravity wave parameters from each of these measurement techniques will be analysed, to build a picture of the gravity wave climatology from all 4 measurement systems which occur due to the upwards propagation of gravity waves. Comparisons will also be made with satellite observations of gravity wave momentum fluxes